Re: Water pipe -OK for primary?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

one could also use the 45 degree bends to make an octagonal one.  But why,
except for artistic merit? Lots of work cutting, soldering, etc. for
notionally the same performance.  One can certainly use 15mm tubing instead
of 1/4" refrig tubing.  It will have less resistance, but you have to trade
that against higher cost and physically larger size to get same inductance. 

I'd look for the absolute thinnest wall copper tubing you can find that is
dead soft so it can be easily formed into a spiral.


Tesla list wrote:
> 
> Original poster: "Jolyon Vater Cox by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
> 
> I am considering whether 15mm copper water pipe, solder elbow joints and
> plastic stand-offs -all available from plumbers merchants- could be used to
> fabricate a square flat pancake primary with the elbows forming the rounded
> corners and the insulators supporting the pipe above a wooden mounting board.
> 
> Is there any merit in this construction -after all wouldn t 15mm pipe
have even
> less resistance than 1/4 inch refrigerator tubing? Or is it be more
likely that
> eddy currents would be induced in the pipes and cause losses?